1- tiene
2- tenemos
3- tiene
4- tienes
5- tienen
6- tengo
7- tiene
8- tienen
9- tenemos
10- tienes
11- tiene
12- tenemos
13- tiene
14- tienes
15- tengo
16- tienen
17- tenemos
18- tengo
19- tienen
20- tengo
answer is B. rapidamente. the sentence is saying "susan has very strong legs. she runs...." and rapidamente means fast.
I can't hear what the audio. You can fill those blanks with any word in my language actually so, If I can't hear the audio, I cannot give you a certain answer. Sorry.